CN115246669A - Method for treating ammonia nitrogen-containing wastewater - Google Patents
Method for treating ammonia nitrogen-containing wastewater Download PDFInfo
- Publication number
- CN115246669A CN115246669A CN202110459002.7A CN202110459002A CN115246669A CN 115246669 A CN115246669 A CN 115246669A CN 202110459002 A CN202110459002 A CN 202110459002A CN 115246669 A CN115246669 A CN 115246669A
- Authority
- CN
- China
- Prior art keywords
- ammonia nitrogen
- containing wastewater
- wastewater
- treating
- electrolytic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The application provides a method for treating ammonia nitrogen-containing wastewater, which comprises the following steps: adding a bromide ion solution into the ammonia nitrogen-containing wastewater; adding the mixed solution into an electrolytic reactor for electrolytic treatment. After the treatment of the invention, more than 80-90% of ammonia nitrogen in the wastewater can be removed. The method of the invention can treat waste by waste, has low treatment cost and wide pH application range, and can be widely applied to the treatment of wastewater containing ammonia nitrogen in various concentrations.
Description
Technical Field
The invention relates to a treatment method of wastewater, in particular to a treatment method for removing ammonia nitrogen in wastewater.
Background
The industries of petrochemical industry, metal smelting, pesticide and fertilizer, dye and the like can generate a large amount of high-concentration ammonia nitrogen wastewater, ammonia Nitrogen (NH) 4 + ) Are the main oxygen-consuming pollutants of water bodies like phosphorus. The high ammonia nitrogen wastewater is discharged into the water body, which can cause eutrophication of the water and generate toxicity to fish and other organisms in the waterTherefore, ammonia nitrogen is one of the main pollutant indexes strictly limited by the country, and with the increasing environmental protection situation, the country has developed a plurality of more severe environmental regulations, such as: for the discharge standards of pollutants in petroleum refining industry and petrochemical industry, GB31570-2015 discharge standards of pollutants in petroleum refining industry and GB31571-2015 discharge standards of pollutants in petrochemical industry, the discharge limits of water pollutants which are required to be discharged by petrochemical enterprises and conform to the standards are as follows: the ammonia nitrogen is less than or equal to 5mg/L, and the total nitrogen is less than or equal to 30mg/L.
At present, the method for removing ammonia nitrogen in wastewater at home and abroad mainly comprises the following steps: ion exchange, chemical precipitation, ammonia evaporation, stripping, breakpoint chlorination, or biochemical (nitrification), but these methods have different limitations in terms of treatment effect, chemical cost, power consumption, noise pollution, wastewater biodegradability in practical applications. In contrast, the electrolysis method for removing ammonia nitrogen has the advantages of simple operation, no introduction of byproducts, secondary pollution, wide applicable wastewater range and the like, is a green and environment-friendly treatment method, and is more and more emphasized by researchers.
CN110436708A an alternative aeration biological fluidized bed denitrification process and system, relates to an alternative aeration biological fluidized bed denitrification process and system, which removes ammonia nitrogen and total nitrogen in wastewater through a plurality of treatment units such as electrolysis, anaerobic biochemistry, aerobic biochemistry and precipitation filtration.
CN110204015A a contains ammonia waste water multistage electrolytic treatment device and method, provide a contain ammonia waste water multistage electrolytic treatment device and method, this method is connected in series by multistage electrolytic device and is formed, is equipped with the motorised valve between the electrolytic device of each grade, can adjust the waste water treatment process according to the quality of water of the actual waste water in a flexible way, has effectively improved the biggest ammonia nitrogen removal ability of the device, can handle the waste water of ammonia nitrogen concentration more than 500 mg/L. The method has the main advantage that the operation cost can be reduced by adjusting the electrolysis grade and the electrolysis current.
The existing electrolytic method for removing ammonia nitrogen has the defects of high power consumption, high cost, low electrolytic efficiency, easy generation of strong hydrogen evolution reaction to cause potential safety hazards and the like in practical application.
Disclosure of Invention
The invention aims to provide an economical and effective treatment method for removing ammonia nitrogen in wastewater.
The application provides a method for treating ammonia nitrogen-containing wastewater, which comprises the following steps:
adding bromide ion solution into the ammonia nitrogen-containing wastewater,
and adding the mixed solution into an electrolysis reactor for electrolysis treatment.
In one embodiment, the ammonia nitrogen concentration in the ammonia nitrogen-containing wastewater is less than 800mg/L, preferably less than 300mg/L.
In one embodiment, the bromide ion solution is a bromine-containing wastewater, wherein the bromine-containing wastewater has a bromide ion content of greater than 200mg/L, preferably greater than 600mg/L.
In one embodiment, the mass ratio of bromide ions to ammonia nitrogen, measured as N, is 7: 1-1: 1, preferably 4: 1-5: 1.
in one embodiment, the conditions of the electrolytic treatment include: the direct current voltage is 5-100v, preferably 2-10v; the current intensity is 1-100A, preferably 0.5-3A.
In one embodiment, the residence time of the ammonia nitrogen-containing wastewater in the electrolysis reactor is 2 to 120min, preferably 10 to 30min.
In one embodiment, the pH of the ammonia nitrogen-containing wastewater is 7 to 14, preferably 8.5 to 10.5.
In one embodiment, the conductivity of the ammonia nitrogen-containing wastewater is 100 to 10000us/cm, preferably 300 to 2000us/cm.
In one embodiment, the anode of the electrolytic reactor may be SnO 2 /Ti、PbO 2 One of Ti, graphite, activated carbon fiber and Pt, preferably graphite; the cathode may be one of metal electrodes, preferably a stainless steel electrode.
In one embodiment, the electrolytic reactor is a diaphragm electrolytic cell, the diaphragm being selected from the group consisting of an ion exchange membrane, an organic or inorganic microporous membrane, and a ceramic membrane.
The method provided by the invention has the following advantages:
1. the method can realize the treatment of waste by waste, can use the bromide ions in the bromine-containing wastewater as the oxidant, does not need to add the oxidant, and reduces the cost.
2. The method is simple, practical and efficient. The method can work under lower current density and voltage, has low energy consumption and high reaction speed, the electrolytic efficiency reaches 70-90 percent, and the ammonia nitrogen removal rate is more than 90 percent.
3. The ammonia nitrogen wastewater is generally alkaline, and in a slightly alkaline water body, hypobromous acid generated by bromide ions has higher oxidation activity, and the pH range of the wastewater suitable for treatment is wider.
4. When ammonia nitrogen wastewater is treated, the used bromide ions can react with the ammonia radical ions in water to generate corresponding ammonium bromide, the oxidability of the ammonium bromide is high and is equivalent to that of hypobromous acid, and the ammonium bromide can be quickly decomposed, so that the energy consumption can be greatly reduced.
Detailed Description
The technical solution of the present invention is further explained below according to specific embodiments. The scope of protection of the invention is not limited to the following examples, which are set forth for illustrative purposes only and are not intended to limit the invention in any way.
The application provides a method for treating ammonia nitrogen-containing wastewater, which comprises the following steps:
adding bromide ion solution into the ammonia nitrogen-containing wastewater,
adding the mixed solution into an electrolytic reactor for electrolytic treatment.
The wastewater containing ammonia nitrogen can be wastewater from various sources, such as high-concentration ammonia nitrogen wastewater generated in petrochemical industry, metal smelting, pesticide and fertilizer, dye and other industries. The ammonia nitrogen-containing wastewater can contain higher content of ammonia nitrogen, for example, the concentration of the ammonia nitrogen can be less than 800mg/L, and preferably less than 300mg/L.
In the present application, the bromide ion solution used in the present application may be various bromide ion-containing solutions, and may even be bromine-containing wastewater, so as to achieve the purpose of treating waste with waste. Bromine in the bromine-containing wastewater is used as an oxidant, so that the oxidant does not need to be added, and the cost can be reduced. The bromine-containing wastewater can be high-concentration bromine-containing chemical wastewater generated in chemical production processes of medicines, catalysts, pesticides, dye intermediates and the like. In one embodiment, the bromine-containing wastewater has a bromide ion content of greater than 200mg/L, preferably greater than 600mg/L.
Experiments prove that compared with a similar method using chloride ions, the method using bromide ions as electrolysis to remove ammonia nitrogen in the ammonia nitrogen-containing wastewater has better effect, and the ammonia nitrogen removal rate can reach more than 90%. The reason for this is presumed to be: firstly, ammonia nitrogen wastewater is generally alkaline, and in a slightly alkaline water body, hypobromous acid generated when bromide ions are used is higher than hypochlorous acid generated when chloride ions are used, so that the ammonia nitrogen wastewater has higher oxidation activity; secondly, when chloride ions and bromide ions are added, the chloride ions and the bromide ions react with the ammonia ions in the water to generate corresponding ammonia chloride and ammonia bromide, but the ammonia chloride is stable and weak in oxidizing property, and the oxidizing property of the ammonia bromide is far higher than that of the ammonia chloride, equivalent to that of hypobromous acid and capable of being rapidly decomposed, so that the ammonia chloride and the bromine can be rapidly used for removing ammonia nitrogen.
In one embodiment, the mass ratio of bromide ions to ammonia nitrogen, measured as N, is 7: 1-1: 1, preferably 4: 1-5: 1.
the invention mixes the bromine-containing wastewater and the ammonia nitrogen-containing wastewater in proportion, and effectively removes the ammonia nitrogen in the wastewater by a direct current electrolysis method. The scheme of the invention can remove ammonia nitrogen in water at lower current intensity and voltage, greatly reduce energy consumption and effectively reduce hydrogen evolution reaction.
In one embodiment, the conditions of the electrolytic treatment include: the direct current voltage is 5-100v, preferably 2-10v; the current intensity is 1-100A, preferably 0.5-3A.
In one embodiment, the residence time of the ammonia nitrogen-containing wastewater in the electrolysis reactor is 2 to 120min, preferably 10 to 30min.
In one embodiment, the pH of the ammonia nitrogen-containing wastewater is 7 to 14, preferably 8.5 to 10.5. The pH regulating agent can be hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, sodium hydroxide, and potassium hydroxide.
In one embodiment, the conductivity of the ammonia nitrogen-containing wastewater is 100 to 10000us/cm, preferably 300 to 2000us/cm.
The process of the invention is carried out in an electrolytic reactor. The anode of the electrolytic reactor may be SnO 2 /Ti、PbO 2 One of Ti, graphite, activated carbon fiber and Pt, preferably graphite; the cathode may be one of metal electrodes, preferably a stainless steel electrode. The cathode, anode and power source may be connected by titanium wire leads.
In the present application, the electrolytic reactor may be an electrolytic cell of various configurations, in particular a diaphragm electrolytic cell. The membrane may be selected from ion exchange membranes, organic or inorganic microporous membranes, and ceramic membranes.
After the treatment of the invention, more than 80-90% of ammonia nitrogen in the wastewater can be removed. The method can treat waste by waste, has low treatment cost and wide pH application range, and can be widely applied to the treatment of wastewater containing ammonia nitrogen in various concentrations. The ammonia nitrogen in the wastewater treated by the method is greatly reduced, and the wastewater can enter a biochemical system independently or after being mixed with other wastewater, and can also be directly discharged according to the concentration of other pollutants in the wastewater.
The present invention will be described in further detail with reference to examples, but the scope of the present invention is not limited to the examples.
In the examples, the determination of chloride and bromide ions in wastewater was carried out by ion chromatography according to DZ/T0064.51-1993 underground Water quality inspection method for chloride, fluoride, bromide, nitrate and sulfate.
Example 1
The wastewater produced by the catalyst contains bromine and ammonia nitrogen with higher concentration, the ammonia nitrogen concentration of the wastewater is 180.1mg/L, the total nitrogen content is 187.0mg/L, the bromide ion content is 860.2mg/L, the pH value is 7.8, and the conductivity is 1500us/cm. The operating conditions were determined as: graphite is used as an anode electrode, stainless steel is used as a cathode electrode, the voltage is 5V, the current intensity is 2.0A, the retention time of the wastewater in the reactor is 20min, the ammonia nitrogen content in the treated wastewater is 22.1mg/L, and the total nitrogen content is 26.5mg/L.
Example 2
The ammonia nitrogen content of the ammonia nitrogen bactericide production wastewater is 85.9mg/LThe total nitrogen content was 87.0mg/L. Using bromine-containing waste water (Br) -1 413.6mg/L, conductivity 750 us/cm) as a bromide ion solution, mixing with ammonia nitrogen wastewater according to the proportion of 1: graphite is used as an anode electrode, stainless steel is used as a cathode electrode, the voltage is 6V, the current intensity is 2.5A, the electrolysis time in the reactor is 30min, the pH value of the electrolysis reaction is 5.8, the ammonia nitrogen content of the treated wastewater is 1.2mg/L, and the total nitrogen content is 2.0mg/L.
Comparative example 1
The bactericide production wastewater of example 2 was electrolyzed using chloride ions as an accelerator, and the wastewater was diluted by one time, the amount of chloride ions added was 210mg/L, and the operating conditions were: graphite is used as an anode, stainless steel is used as a cathode, the voltage is 6V, the current intensity is 2.5A, the electrolysis time in the reactor is 30min, the pH value of the electrolysis reaction is 5.8, the ammonia nitrogen content of the treated wastewater is 20.8mg/L, and the total nitrogen content is 22.0mg/L. Comparison with the results of example 2 shows that the effect of removing ammonia nitrogen by the electrolytic method using chloride ions is much lower than the effect of removing ammonia nitrogen by the electrolytic method using bromide ions under the present pH conditions.
Example 3
The ammonia nitrogen of the metal smelting wastewater is 209.1mg/L, the total nitrogen is 214.3mg/L, the B/C is 0.05, the pH value is 10.8, the conductivity is 956us/cm, and the anion in the wastewater is sulfate radical. Bromine-containing waste water was used as a bromide ion solution having a bromide ion concentration of 1058.2mg/L. Uniformly mixing the wastewater with ammonia nitrogen wastewater according to the proportion of 1. The operating conditions were determined as: graphite is used as an anode electrode, stainless steel is used as a cathode electrode, the voltage is 5V, the current intensity is 3.0A, the pH value is 10.1, the retention time of the wastewater in the reactor is 30 minutes, the ammonia nitrogen content of the treated metal smelting wastewater is reduced to 0.9mg/L, the total nitrogen content is 2.5mg/L, the B/C content is 0.41, and the treated wastewater is mixed with other wastewater, diluted and then enters a biochemical system to remove organic matters.
Comparative example 2
The metallurgical wastewater of the metal of example 3 was treated by a pure electrolytic technique, the wastewater was diluted one time, the pH of the wastewater was 9.8, and the operating conditions were: graphite is used as an anode, stainless steel is used as a cathode, the voltage is 5V, the current intensity is 3.0A, the retention time of the wastewater in the reactor is 30 minutes, the ammonia nitrogen of the treated wastewater is 166.6mg/L, and the total nitrogen is 186.6mg/L, which indicates that the ammonia nitrogen is removed by pure direct electrolysis, the electrolysis efficiency is low, and the treatment effect is poor.
Comparative example 3:
the metallurgical waste water of the metal of the embodiment 3 is treated by electrolysis by taking chloride ions as an accelerant, the waste water is diluted by one time, the adding amount of the chloride ions is 500mg/L, and the operation conditions are as follows: graphite is used as an anode, stainless steel is used as a cathode, the voltage is 5V, the current intensity is 3.0A, the pH value of wastewater in the reactor is 9.8, the retention time is 30 minutes, the ammonia nitrogen in the treated wastewater is 94.6mg/L, and the total nitrogen is 99.6mg/L. Comparison with the results of example 3 shows that the effect of removing ammonia nitrogen by the electrolytic method using chloride ions is much lower than the effect of removing ammonia nitrogen by the electrolytic method using bromide ions under the present pH conditions.
Comparative example 4:
the metallurgical waste water of example 3 was treated electrolytically with hydrogen peroxide as accelerator, diluting the waste water by one time, operating conditions were: h 2 O 2 The addition amount was 500mg/L, the pH of the test wastewater was 9.8, the electrode conditions were the same as in example 3, the voltage was 5V, and the current intensity was 3.0A. The ammonia nitrogen concentration of the treated wastewater is 161.6mg/L, and the total nitrogen is 165.4mg/L. Compared with the results of example 3, it is demonstrated that the effect of removing ammonia nitrogen by electrolysis using hydrogen peroxide as an accelerator is much lower than that of removing ammonia nitrogen by electrolysis using bromide ions.
It should be noted by those skilled in the art that the described embodiments of the present invention are merely exemplary and that various other substitutions, alterations, and modifications may be made within the scope of the present invention. Accordingly, the present invention is not limited to the above-described embodiments, but is only limited by the claims.
Claims (10)
1. A method for treating ammonia nitrogen-containing wastewater comprises the following steps:
adding bromide ion solution into the ammonia nitrogen-containing wastewater,
and adding the mixed solution into an electrolysis reactor for electrolysis treatment.
2. The method for treating ammonia nitrogen containing wastewater according to claim 1, wherein the ammonia nitrogen concentration in the ammonia nitrogen containing wastewater is less than 800mg/L, preferably less than 300mg/L.
3. Method for treating ammonia nitrogen containing wastewater according to claim 1, wherein the bromide ion solution is bromine-containing wastewater, wherein the bromine ion content of the bromine-containing wastewater is more than 200mg/L, preferably more than 600mg/L.
4. The method for treating ammonia nitrogen-containing wastewater according to claim 1, wherein the mass ratio of the bromide ions to the ammonia nitrogen in terms of N is 7: 1-1: 1, preferably 4: 1-5: 1.
5. the method for treating ammonia nitrogen containing wastewater according to claim 1, wherein the conditions of the electrolytic treatment comprise: the direct current voltage is 5-100v, preferably 2-10v; the current intensity is 1-100A, preferably 0.5-3A.
6. Method for treating ammonia nitrogen containing wastewater according to claim 1, wherein the residence time of the ammonia nitrogen containing wastewater in the electrolytic reactor is 2-120min, preferably 10-30min.
7. The method for treating ammonia nitrogen containing wastewater as claimed in claim 1, wherein the pH value of the ammonia nitrogen containing wastewater is 7-14, preferably 8.5-10.5.
8. Method for treating ammonia nitrogen containing wastewater according to claim 1, wherein the conductivity of the ammonia nitrogen containing wastewater is 100-10000us/cm, preferably 300-2000us/cm.
9. The method for treating ammonia nitrogen containing wastewater as claimed in claim 1, wherein the anode of the electrolytic reactor can be SnO 2 /Ti、PbO 2 One of Ti, graphite, activated carbon fiber and Pt, preferably graphite; the cathode may be one of metal electrodes, preferably a stainless steel electrode.
10. The method for treating nitrogen-containing wastewater according to claim 1, wherein the electrolytic reactor is a diaphragm electrolytic cell, and the diaphragm is selected from the group consisting of an ion exchange membrane, an organic or inorganic microporous membrane, and a ceramic membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110459002.7A CN115246669A (en) | 2021-04-27 | 2021-04-27 | Method for treating ammonia nitrogen-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110459002.7A CN115246669A (en) | 2021-04-27 | 2021-04-27 | Method for treating ammonia nitrogen-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115246669A true CN115246669A (en) | 2022-10-28 |
Family
ID=83695776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110459002.7A Pending CN115246669A (en) | 2021-04-27 | 2021-04-27 | Method for treating ammonia nitrogen-containing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115246669A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106315936A (en) * | 2016-08-31 | 2017-01-11 | 浙江奇彩环境科技股份有限公司 | Treatment method of bromamine acid wastewater |
| CN205973941U (en) * | 2016-08-05 | 2017-02-22 | 深圳市泓达环境科技有限公司 | Ammonia nitrogen wastewater treatment device |
| CN111087049A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method for treating organic nitrogen wastewater |
| CN111087047A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Treatment method of bromine-containing organic wastewater |
-
2021
- 2021-04-27 CN CN202110459002.7A patent/CN115246669A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205973941U (en) * | 2016-08-05 | 2017-02-22 | 深圳市泓达环境科技有限公司 | Ammonia nitrogen wastewater treatment device |
| CN106315936A (en) * | 2016-08-31 | 2017-01-11 | 浙江奇彩环境科技股份有限公司 | Treatment method of bromamine acid wastewater |
| CN111087049A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Method for treating organic nitrogen wastewater |
| CN111087047A (en) * | 2018-10-24 | 2020-05-01 | 中国石油化工股份有限公司 | Treatment method of bromine-containing organic wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101838074B (en) | Method for degrading nitrobenzene waste water by polyphase electrocatalytic oxidation-Fenton coupling process and reactor thereof | |
| Huang et al. | Case study on the bioeffluent of petrochemical wastewater by electro-Fenton method | |
| CN109534453B (en) | Chlorine free radical mediated electrochemical filtration system and application thereof | |
| CN108996821B (en) | Treatment system and treatment method for landfill leachate | |
| US11795086B2 (en) | Combined waste water and gas treatment system for efficiently decarbonizing and removing nitrogen | |
| CN106277480B (en) | Treatment process of high-concentration ammonia nitrogen wastewater | |
| CN111087047A (en) | Treatment method of bromine-containing organic wastewater | |
| CN108911355B (en) | Landfill leachate MBR effluent treatment method and system | |
| CN110683617A (en) | Differential control based paired wastewater electrolysis treatment method | |
| CN204022601U (en) | The micro-electrolysis advanced oxidation of MEO reactor | |
| KR20170099616A (en) | Electrodialysis coupled with electrochemical nitrogen removal Process for contaminated groundwater treatment, and Apparatus therefor | |
| CN113582439A (en) | Iron-carbon Fenton pretreatment method for acidic high-salt high-concentration organic wastewater | |
| JPH07100466A (en) | Method for treating waste water | |
| KR101046942B1 (en) | Water treatment method using electrolysis | |
| CN115072912B (en) | Combined treatment method for fluororesin production wastewater | |
| CN115246669A (en) | Method for treating ammonia nitrogen-containing wastewater | |
| CN112499754B (en) | Nitrogenous wastewater treatment system | |
| CN111087049A (en) | Method for treating organic nitrogen wastewater | |
| KR20060046358A (en) | The method for electrochemical wastewater treatment using boron doped diamond electrodes | |
| CN112239264B (en) | Method for treating carbon-containing organic matters in waste brine | |
| CN109231543B (en) | Treatment method of wastewater containing high-concentration cyanonitrobenzene | |
| JP3788688B2 (en) | Method and apparatus for electrolytic treatment of oxidized nitrogen-containing water | |
| KR20170099615A (en) | Electrochemical Process for high concentration of nitrate containing wastewater treatment, and Apparatus therefor | |
| CN110255784B (en) | Method for synchronously removing nitrogen and phosphorus in pig-raising wastewater | |
| CN112919728A (en) | Blue algae mud pressure filtrate treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |